EP0139896B1 - Disc brake - Google Patents

Disc brake Download PDF

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Publication number
EP0139896B1
EP0139896B1 EP84108999A EP84108999A EP0139896B1 EP 0139896 B1 EP0139896 B1 EP 0139896B1 EP 84108999 A EP84108999 A EP 84108999A EP 84108999 A EP84108999 A EP 84108999A EP 0139896 B1 EP0139896 B1 EP 0139896B1
Authority
EP
European Patent Office
Prior art keywords
pair
rotor
tie bar
caliper
disc brake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84108999A
Other languages
German (de)
French (fr)
Other versions
EP0139896A1 (en
Inventor
Irving R. Ritsema
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allied Corp
Original Assignee
Allied Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allied Corp filed Critical Allied Corp
Publication of EP0139896A1 publication Critical patent/EP0139896A1/en
Application granted granted Critical
Publication of EP0139896B1 publication Critical patent/EP0139896B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
    • F16D55/227—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing by two or more pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/003—Arrangements for testing or measuring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0008—Brake supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0016—Brake calipers

Definitions

  • This invention relates to a disc brake wherein a caliper is movably supported on a torque member such that the caliper biases a pair of friction elements into engagement with a rotor during braking.
  • the rotor In a vehicle equipped with a disc brake, the rotor is disposed adjacent a wheel assembly to rotate therewith.
  • the disc brake includes a caliper which must accommodate spacing limitations between the wheel assembly and the rotor because an outer leg of the caliper must fit between the rotor and the wheel assembly.
  • the disc brake includes a torque member with a pair of spaced arms opposing rotation of a pair of friction elements. With one of the arms absorbing braking torque from the pair of friction elements, the one arm is loaded to deflect relative to the other arm. The deflection of the one arm imparts stresses to the latter so that it is possible for the one arm to crack and render the disc brake inoperable.
  • the present invention proposes a disc brake of the type described in the preamble of claim I.
  • a disc brake of this type has already been described in US-A-4 220 224 which, as the one of the present invention, provides an advantage that the torque member is reinforced via a tie bar without requiring added spacing between the rotor, the wheel assembly and the caliper.
  • Figure 1 is a side cross-sectional view of a disc brake constructed in accordance with the present invention.
  • Figure 2 is a top view of the disc brake shown in Figure 1.
  • Figure 3 is a cross-sectional view taken along line 3-3 of Figure 2.
  • a disc brake 10 comprises a torque member 12 fixedly coupled to a wheel or axle support 14.
  • a caliper 16 is movably supported on the torque member 12.
  • the caliper 16 includes an inner leg 18 forming an actuator assembly 20 engaging an inner friction element 22.
  • a bridge portion 24 of the caliper extends over an outer edge 26 of a rotor 28 to connect with an outer leg 30 of the caliper 16.
  • the outer leg 30 engages an outer friction element 32.
  • the actuator assembly 20 includes one or more pistons 34 sealingly disposed within corresponding bores 36 to form one or more pressure chambers 38, Fluid pressure communicated to the pressure chambers 38 biases the pistons 34 toward the rotor 28 to directly engage inner friction element 22 with rotor 28. With the inner friction element engaging the rotor, reaction forces imparted to the caliper 16 cause the latter to move to the right in Figure 1 so that the outer leg 30 moves the outer friction element 32 into engagement with the rotor 28.
  • the torque member 12 extends radially outwardly from the support 14 to define a pair of arms, one of which is shown in Figures 2 and 3 at 40.
  • the pair of arms 40 are circumferentially spaced to form a recess 43 therebetween for receiving the actuator assembly 20.
  • the pair of arms 40 terminate in a pair of flanges 42, respectively, extending axially across the outer edge 26 of the rotor 28 and adjacent an outer surface 44 of the rotor 28.
  • a tie bar 50 extends circumferentially between the pair of flanges.
  • the tie bar 50 is disposed within a radial spacing between the outer surface 44 of edge 26 of the rotor 28 and the bridge portion 24 of the caliper 16. From Figure 1, the axial width of the tie bar 50 is slightly less than the axial width of the rotor 28 so that the tie bar will not hinder removal of the friction elements 22 and 32 after the latter have worn.
  • each flange 42 cooperates with the tie bar 50 at the intersection therebetween to define a bore 52 for movably receiving a pin 54.
  • Each pin 54 is secured to the caliper 12 via caliper lugs 56 and cotter keys 58 so that the caliper moves with the pins relative to the bore 52.
  • the caliper 16 includes a pair of apertures 60, see Figure 2, exposing the pins 54, the ends of the tie bar 50, and the ends of the friction elements 22 and 32.
  • the openings provide free flow of air around the rotor and friction elements to reduce heat build up in the rotor and friction elements.
  • the openings permit the pins 54 to be fitted to the torque member and attached to the caliper after the caliper is disposed in its operative position relative the torque member.
  • one of the pins 54 is readily accessible for removal from the torque bore. Thereafter, the caliper is pivoted about the other pin to permit friction element removal.
  • a brake application urges the friction elements 22 and 32 against the rotor 28 and in the direction A against the one pin 54 at the left in Figure 2.
  • the one pin 54 transmits braking forces to its corresponding flange 42 via the wall of bore 52.
  • the braking forces are transmitted from the corresponding left flange 42 in Figure 2 to its associated arm 40 and support 14 and also to the tie bar 50 to pull on the right flange 42 of Figure 2.
  • braking torque is spilt between the torque member flanges to minimize circumferential deflection for the torque member.
  • the tie bar 50 minimizes circumferential deflections while at the same time accomodating space limitations with a caliper and wheel assembly associated with the disc brake.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Control Of Turbines (AREA)

Description

  • This invention relates to a disc brake wherein a caliper is movably supported on a torque member such that the caliper biases a pair of friction elements into engagement with a rotor during braking.
  • In a vehicle equipped with a disc brake, the rotor is disposed adjacent a wheel assembly to rotate therewith. The disc brake includes a caliper which must accommodate spacing limitations between the wheel assembly and the rotor because an outer leg of the caliper must fit between the rotor and the wheel assembly. In addition, the disc brake includes a torque member with a pair of spaced arms opposing rotation of a pair of friction elements. With one of the arms absorbing braking torque from the pair of friction elements, the one arm is loaded to deflect relative to the other arm. The deflection of the one arm imparts stresses to the latter so that it is possible for the one arm to crack and render the disc brake inoperable.
  • The present invention proposes a disc brake of the type described in the preamble of claim I.
  • A disc brake of this type has already been described in US-A-4 220 224 which, as the one of the present invention, provides an advantage that the torque member is reinforced via a tie bar without requiring added spacing between the rotor, the wheel assembly and the caliper.
  • This application proposes novel.features which appear in the characterizing portion of claim 1 and in the following claims.
  • The accompanying drawings illustrate one embodiment of the present invention. Figure 1 is a side cross-sectional view of a disc brake constructed in accordance with the present invention. Figure 2 is a top view of the disc brake shown in Figure 1. Figure 3 is a cross-sectional view taken along line 3-3 of Figure 2.
  • A disc brake 10 comprises a torque member 12 fixedly coupled to a wheel or axle support 14. A caliper 16 is movably supported on the torque member 12. The caliper 16 includes an inner leg 18 forming an actuator assembly 20 engaging an inner friction element 22. A bridge portion 24 of the caliper extends over an outer edge 26 of a rotor 28 to connect with an outer leg 30 of the caliper 16. The outer leg 30 engages an outer friction element 32. The actuator assembly 20 includes one or more pistons 34 sealingly disposed within corresponding bores 36 to form one or more pressure chambers 38, Fluid pressure communicated to the pressure chambers 38 biases the pistons 34 toward the rotor 28 to directly engage inner friction element 22 with rotor 28. With the inner friction element engaging the rotor, reaction forces imparted to the caliper 16 cause the latter to move to the right in Figure 1 so that the outer leg 30 moves the outer friction element 32 into engagement with the rotor 28.
  • The torque member 12 extends radially outwardly from the support 14 to define a pair of arms, one of which is shown in Figures 2 and 3 at 40. The pair of arms 40 are circumferentially spaced to form a recess 43 therebetween for receiving the actuator assembly 20. The pair of arms 40 terminate in a pair of flanges 42, respectively, extending axially across the outer edge 26 of the rotor 28 and adjacent an outer surface 44 of the rotor 28. In order to reinforce the pair of arms and flanges relative to each other a tie bar 50 extends circumferentially between the pair of flanges. The tie bar 50 is disposed within a radial spacing between the outer surface 44 of edge 26 of the rotor 28 and the bridge portion 24 of the caliper 16. From Figure 1, the axial width of the tie bar 50 is slightly less than the axial width of the rotor 28 so that the tie bar will not hinder removal of the friction elements 22 and 32 after the latter have worn.
  • Turning to Figure 3, each flange 42 cooperates with the tie bar 50 at the intersection therebetween to define a bore 52 for movably receiving a pin 54. Each pin 54 is secured to the caliper 12 via caliper lugs 56 and cotter keys 58 so that the caliper moves with the pins relative to the bore 52.
  • The caliper 16 includes a pair of apertures 60, see Figure 2, exposing the pins 54, the ends of the tie bar 50, and the ends of the friction elements 22 and 32. The openings provide free flow of air around the rotor and friction elements to reduce heat build up in the rotor and friction elements. In addition, the openings permit the pins 54 to be fitted to the torque member and attached to the caliper after the caliper is disposed in its operative position relative the torque member. When the friction elements are to be replaced, one of the pins 54 is readily accessible for removal from the torque bore. Thereafter, the caliper is pivoted about the other pin to permit friction element removal.
  • Assuming rotor rotation in the direction A in Figure 2, a brake application urges the friction elements 22 and 32 against the rotor 28 and in the direction A against the one pin 54 at the left in Figure 2. The one pin 54 transmits braking forces to its corresponding flange 42 via the wall of bore 52. The braking forces are transmitted from the corresponding left flange 42 in Figure 2 to its associated arm 40 and support 14 and also to the tie bar 50 to pull on the right flange 42 of Figure 2. As a result, braking torque is spilt between the torque member flanges to minimize circumferential deflection for the torque member. In addition, the tie bar 50 minimizes circumferential deflections while at the same time accomodating space limitations with a caliper and wheel assembly associated with the disc brake.

Claims (5)

1. A disc brake having a caliper (16) movably supported by a torque member (12) and cooperating with a pair of friction elements (22, 32) to urge the latter into engagement with a rotor (28) during braking, the torque member (12) defining a first portion (40) extending radially to a position outside an outermost radial edge (44) of the rotor (28) and a second portion (42) extending axially over the outermost radial edge (44) of the rotor (28), the first portion (40) forming a recess (43) circumferentially separating a pair of arms of the torque member (12) from each other in order to receive an actuator portion (20) of the caliper (16) within the recess (43) and the second portion (42) forming a pair of flanges connected, respectively, with the pair of arms and also cooperating, indirectly, with at least one of the pair of friction elements (22, 32) to oppose rotation of the one friction element, the torque member (12) first portion (40) being on one side of the rotor (28) and the torque member (12) further defining a tie bar (50) extending circumferentially between said pair of flanges, said tie bar (50) connecting said pair of flanges to oppose movement between said pair of flanges and cooperating with said pair of flanges to define a pair of apertures (52), and a pair of pins (54) being disposed within said pair of apertures (52), respectively, so that each pin (54) extends over the outermost radial edge (44) of the rotor (28) in opposite axial directions to securements on said caliper (16), the pins (54) movably received in said apertures (52) to provide the movable support of the caliper (16) by said torque member (12), characterized in that the tie bar is disposed at a radial location beyond the outermost radial edge (44) of the rotor (28), the apertures disposed substantially at connections between said tie bar (50) and said pair of flanges, and at least one of the pins (54) supporting said one friction element so that braking torque is transmitted from the one pin to the respective flange, tie bar, arms and torque member.
2. The disc brake in accordance with claim 1, in which said caliper (16) defines an inner leg (18) on one side of the rotor (28) forming said actuator (20) portion to directly engage one of said pair of friction elements (22, 32), said caliper (16) defining an outer leg (30) on the other side of the rotor (28) engaging the other friction element (32), said caliper .(16) including a bridge (24) extending axially between the inner and outer legs and over the outermost radial edge (44) of the rotor (28), and said bridge (24) forming a radial spacing with the outermost radial edge (44) of the rotor (28) such that the tie bar (50) is disposed within said spacing.
3. The disc brake in accordance with claim 1 or 2, in which said tie bar (50) defines an axial width substantially equal to but slightly less than the axial width of said rotor (28).
4. The disc brake in accordance with any of the preceding claims, in which said tie bar (50) is disposed within an axial spacing defined by said pair of friction elements (22, 32).
5. The disc brake in accordance with any of the preceding claims, in which said tie bar (50) forms a substantially uniform clearance with said rotor (28) over the entire length of said tie bar (50).
EP84108999A 1983-10-03 1984-07-30 Disc brake Expired EP0139896B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US538398 1983-10-03
US06/538,398 US4530423A (en) 1983-10-03 1983-10-03 Disc brake including tie bar on stationary torque receiving member

Publications (2)

Publication Number Publication Date
EP0139896A1 EP0139896A1 (en) 1985-05-08
EP0139896B1 true EP0139896B1 (en) 1988-09-21

Family

ID=24146770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108999A Expired EP0139896B1 (en) 1983-10-03 1984-07-30 Disc brake

Country Status (10)

Country Link
US (1) US4530423A (en)
EP (1) EP0139896B1 (en)
JP (1) JPS60101328A (en)
AU (1) AU568393B2 (en)
BR (1) BR8404995A (en)
CA (1) CA1229051A (en)
DE (1) DE3474198D1 (en)
ES (1) ES8506868A1 (en)
IT (1) IT1178530B (en)
MX (1) MX160999A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573554A (en) * 1983-10-03 1986-03-04 Allied Corporation Disc brake with caliper stabilizing tie-bar
IT8422508V0 (en) * 1984-07-09 1984-07-09 Brembo Spa DISC BRAKE WITH A CALIPER BODY AND PADS HOLDED IN A HOOK IN THE CALIPER BODY.
DE3539602A1 (en) * 1985-11-08 1987-05-14 Teves Gmbh Alfred INTERNAL DISC BRAKE, ESPECIALLY FOR MOTOR VEHICLES
US5022500A (en) * 1988-09-14 1991-06-11 Brake And Clutch Industries Australia Pty. Ltd. Disc brake caliper
DE3919054A1 (en) * 1989-06-10 1990-12-13 Teves Gmbh Alfred Part lined disc brake for vehicles - has U=shaped brake housing with radial arms and piston and brake lining holder pins
DE3934019C1 (en) * 1989-10-11 1991-05-08 Deutsche Perrot-Bremse Gmbh, 6800 Mannheim, De
JPH07746Y2 (en) * 1990-04-28 1995-01-11 日信工業株式会社 Reaction force type disc brake
DE19926000B4 (en) * 1999-06-08 2004-05-13 Dr.Ing.H.C. F. Porsche Ag Fastening device for a brake caliper on a wheel carrier
US6923296B1 (en) 2004-03-05 2005-08-02 Robert Bosch Corporation Disc Brake
US7086505B2 (en) * 2004-12-10 2006-08-08 Robert Bosch Gmbh Disc brake
US20060289251A1 (en) * 2005-06-23 2006-12-28 Kelsey-Hayes Company Taper wear compensation of a friction pad for a disc brake assembly
US8714317B1 (en) 2006-03-31 2014-05-06 Robert Bosch Gmbh Disc brake
ITMI20061973A1 (en) * 2006-10-13 2008-04-14 Freni Brembo Spa BRAKE CALIPER WITH DISC
US8991566B2 (en) * 2011-06-27 2015-03-31 Ausco Products, Inc. Caliper brake

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3406792A (en) * 1966-11-21 1968-10-22 Budd Co Disk brake housing stabilizing means
DE2440076A1 (en) * 1974-08-21 1976-03-11 Buderus Eisenwerk Floating saddle disc brake with cast brake carrier - has cast in steel tie rod for additional strength
JPS5484484U (en) * 1977-11-26 1979-06-15
JPS5493768A (en) * 1978-01-05 1979-07-25 Tokico Ltd Disc brake apparatus
DE2804808C3 (en) * 1978-02-04 1988-09-29 Alfred Teves Gmbh, 6000 Frankfurt Brake shoe holder for a partially lined disc brake, in particular for motor vehicles

Also Published As

Publication number Publication date
IT1178530B (en) 1987-09-09
AU3191484A (en) 1985-04-18
AU568393B2 (en) 1987-12-24
ES536375A0 (en) 1985-08-01
BR8404995A (en) 1985-08-20
IT8422938A1 (en) 1986-04-01
MX160999A (en) 1990-06-29
EP0139896A1 (en) 1985-05-08
US4530423A (en) 1985-07-23
CA1229051A (en) 1987-11-10
IT8422938A0 (en) 1984-10-01
ES8506868A1 (en) 1985-08-01
DE3474198D1 (en) 1988-10-27
JPS60101328A (en) 1985-06-05

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